nmr_probes
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nmr_probes [2019/10/21 15:41] pereira [Troubleshooting] |
nmr_probes [2023/02/13 11:23] noji [Description] Updated to reflect recent changes as to how to run the NMR GUI. |
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| ====== NMR Control ===== | ====== NMR Control ===== | ||
| - | Two digital oscilloscopes are dedicated to NMR readout – one for the analysis line NMRs and one for the spectrograph NMRs. The scopes are located in data-U6, in upper two shelves on the right electronics rack. They are isolated from clean ground because this signals from the NMR probes are on a dirty ground. | + | Two digital oscilloscopes are dedicated to NMR readout – one for the analysis line NMRs and one for the spectrograph NMRs. The scopes are located in the S3 mezzanine. They are isolated from clean ground because this signals from the NMR probes are on a dirty ground. |
| ===== Motivation ===== | ===== Motivation ===== | ||
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| ===== Description ===== | ===== Description ===== | ||
| - | The NMR running programs for both the S800 analysis line and spectrograph dipoles can be started from the desktop of computer [[Software# | + | The NMR running programs for both the S800 analysis line and spectrograph dipoles can be started |
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| + | $ ssh [your-user-name-on-EXP]@exp-s3-nmr -Y | ||
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| + | and typing, for the analysis line dipoles | ||
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| + | $ / | ||
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| + | and for the spectrograph dipoles | ||
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| + | $ /usr/bin/wish /srv/s3-nmr/spectrograph/ | ||
| Sometimes the initialization of these applications fail. In that case check section [[nmr probes# | Sometimes the initialization of these applications fail. In that case check section [[nmr probes# | ||
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| * The terminal server is behind the NMR controllers | * The terminal server is behind the NMR controllers | ||
| * Simply turn it off, wait few seconds, and turn it back on | * Simply turn it off, wait few seconds, and turn it back on | ||
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| + | ==== Spectrograph NMR GUI " | ||
| + | * This is typically the case when the thresholds in the NMR GUI are not set properly. If they are too low, the program may lock in noise. Conversely, if the thresholds are too high, it may miss a weak resonance. | ||
| + | * Threshold for the Spectrograph resonance can be adjusted by hand in the Spectrograph NMR GUI. In general, a threshold 0.15 mV is good for normal NMR signals, whereas 0.10 mV may be necessary if the signal are too weak. | ||
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| ==== Manually setting Dipole Fields | ==== Manually setting Dipole Fields | ||
nmr_probes.txt · Last modified: 2024/01/29 10:51 by swartzj
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